Omega Pre-owned Seamaster 300. This pre-owned watch is in Used (very good) condition — Rank A Used: a few traces of usage but overall in very good condition; Seller Ranking: Rank A. Glass, dial, hands, case, bezel, crown, case back and bracelet scratches are all listed as insignificant. Before purchasing, please refer to the images for the exact condition of the item. ([omegawatches.jp](https://www.omegawatches.jp/watch-omega-seamaster-300-master-co-axial-chronometer-41-mm-23330412101001)) Key attributes: Black | Stainless steel | Water resistance: 300 m (30 bar) | High anti-magnetic resistance (>15,000 gauss) | 60-hour power reserve | Chronometer accuracy (COSC certified) ([omegawatches.jp](https://www.omegawatches.jp/watch-omega-seamaster-300-master-co-axial-chronometer-41-mm-23330412101001)) | Self-winding (automatic) movement | Screw-down crown | Unidirectional (diver) rotating bezel | Folding clasp with comfort adjustment | Chronometer-certified movement | Sand‑blasted black dial with vintage Super‑LumiNova on hands and indices | Ceramic bezel with Liquidmetal® diving scale | Domed sapphire crystal with anti‑reflective treatment | Stainless steel bracelet with folding clasp and comfort setting | Transparent (see‑through) caseback | Dimensions & fit: Regular fit | Composition & care: Stainless steel | Ceramic (bezel) | Sapphire crystal | Liquidmetal® alloy | Super‑LumiNova on hands and indices | Wipe with a soft cloth. Ensure crown is screwed down before exposure to water. Have serviced by an authorized service center at regular intervals.